On 1/7/20 9:30 AM, Stefan Wahren wrote: > Hi Eric, > > Am 07.01.20 um 18:04 schrieb Eric Dumazet: >> >> >> I doubt TSO and SACK have a serious generic bug like that. >> >> Most likely the TSO implementation on the driver/NIC has a bug . > > Yes, the issue isn't reproducible with the Raspberry Pi 3B and the same > kernel (without +). The main difference between both boards is the > different ethernet USB chip: > > Raspberry Pi 3B: smsc95xx > Raspberry Pi 3B+: lan78xx > >> >> Anyway you do not provide a kernel version, I am not sure what you expect from us. > > It's Linux 5.4.7 (arm64) as in the provided github link. I asked > Pierre-Francois to report this issue here, so the issue get addressed > properly. Currently this very old bug not fixed in mainline and the > Raspberry Pi vendor tree uses a workaround (disable TSO). This is puzzling. Bug seems trivial enough :/
